Red oxide primer is an anti-corrosion coating designed to stop rust formation. US Red Iron Oxide Primer based on DSM NEOCRYL A-6085 and HALOX® SZP-391 US White DTM based on DSM NEOCRYL A-6085, and HALOX® CW-491 & HALOX® FLASH-X® 150 RHOPLEX WL-100. Compare KRYLON. Red Oxide Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-246, 15 oz. View cart for details. Get the best deals on Automotive Paint Primers. Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. Dupli-Color DAP1694 Red Oxide General Purpose Sandable Primer - 12 oz. Red oxide primer undergoes chemical reactions with iron surfaces and iron oxide, forming insoluble compounds known as plumbates.In plumbates, lead exists as a part of the anion. 2067830 - 12 oz. Copyright © 1995-2020 eBay Inc. All Rights Reserved. Find a great range of car primers and primer paint at Halfords. Free delivery and returns on eBay Plus items for Plus members. Red-oxide wasn't the only primer color used and a single car could have multiple colors/shades of primer … 3M Red Abrasive Stikit Sheet Roll, 01688, P80, 2-3/4 in x 25 yd, D weight, CANOPUS - 3M Scotch Brite Scuff Pads Very Fine and Ultra Fine (3+3), 3M Red Abrasive Stikit Sheet Roll, 01681, P400, 2-3/4 in x 25 yd, Lot of 5 Red 3M Scuff Pads Scotch Brite 3M Brand, 3M 7447-60 6" x 9" Maroon Alum Ox General Purpose Hand Pads (60 Pcs/Pk), 3M Red Abrasive Stikit Sheet Roll, 01683, P240, 2-3/4 in x 25 yd, 3M Red Abrasive Stikit Sheet Roll, 01682, P320, 2-3/4 in x 25 yd, 3M Wetordry Abrasive Sheet, 02034, 1000, 9 in x 11 in, 50 sheets per carton, Dura-Gold - Premium Film Back - 3000 Grit 6" Green Film - PSA Self Adhesive Stickyback Sanding Discs for DA Sanders - Box of 25 Sandpaper Finishing Discs for Automotive and Woodworking, 3M Red Abrasive Stikit Sheet Roll, 01687, P120, 2-3/4 in x 25 yd, Norton 0 Grade Very Fine Cleaning and Scuffing Pad 1 pk, 3M Red Abrasive Stikit Sheet Roll, 01686, P150, 2-3/4 in x 25 yd, Dura-Gold 6" x 9" Premium Maroon General Purpose Scuff Pads, 20/ Pack, 3M 02589 Stikit Gold 2-3/4" x 45 Yard P500A Grit Sheet Roll. Canopus - 3M Scotch Brite Scuff Pads Very Fine and Ultra Fine (5+5). Red oxide primer is applied using a brush, roller or spray. Spray Select a Color (3) 12 oz. (1 part lacquer primer to 1 part lacquer thinner, sold separately, see below). can, Light Grey Automotive Grade Acrylic Aerosol Primer Fast Dry SMR-240, 15 oz. The latest is pictured on my web site -there are 3 pictures near the end if my 62 SS 409 just after they where painted: I think it matches the original factory red oxide … Shop today! 1, Richville, MN, USA 56576 Toll Free: 1-877-630-6963 MN: 701-866-4719 VHT ESP303007 Prime Coat Red Oxide Sandable Primer Filler Can - 11 oz. Red primer is used mostly on sheet steel and galvanized steel. Shop with Afterpay on eligible items. Primer and a Sealer, Easy Sanding with Great Adhesion. We have perfect filler primers fr your car bodywork and paint repairs. PCRC: Ask the Expert: Zinc Chromate Primer and Red Oxide Zinc Chromate Primer. Something went wrong. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Net Weight. Made in USA. 4.4 out of 5 stars 241. kit Hot Temp Reducer SMR-277-B/​0085, 2.1 voc Acrylic Lacquer Primer Black 2 gal. Nice Fill, Adhesion & Sanding Acrylic Lacquer Primer, Direct to metal adhesion, 4:1:1 is also a great sealer, High Build, Fast Dry, Easy Sand 2.1 voc Urethane Primer, Primer and a Sealer, Easy Sanding with Great Adhesion, Epoxy primer & sealer with great color & gloss holdout, Sand in Only 20 minutes! 40416 County Hwy. Dark Grey Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-220, 15 oz. Krylon 1982 Farm & Implement Brush, Sandable, 1 Gallon Architectural Paints, Each, Red Oxide Pri… Automotive Bumper Grade Aerosol Gray Flexible Primer 12oz, Fast Dry, SMR-280, Speedokote High Build 2K Urethane Primer Gray Gallon Kit, SMR-210/21​1-K, Universal Self Etching Aerosol Gray Primer 14.75 oz Great Metal Adhesion SMR-295, High Build Acrylic Lacquer Primer 2.1 voc Gray Gallon Fast Easy Sanding, SMR-277, Universal Activator for Speedokote primers, hot rod black, etc, quart SMR-211-Q, Universal Activator for Speedokote low voc primer and bed liner, quart SMR-222-Q, Automotive Bumper Grade Aerosol Black Flexible Primer 12oz, Fast Dry, SMR-290, DTM 2.1 voc Grey Urethane Primer & Sealer gallon kit, 4:1 mix, SS-2000G/S​MR-222, DTM 2.1 voc Black Urethane Primer & Sealer gallon kit, 4:1 mix, SS-2000B/S​MR-222, DTM 2.1 voc White Urethane Primer & Sealer gallon kit, 4:1 mix SS-2000W/S​MR-222, DTM 2.1 voc Grey Urethane Primer Sealer quart kit, 4:1 mix, SS-2000G-Q​/SMR-222-8, DTM 2.1 voc Black Urethane Primer Sealer quart kit 4:1 mix, SS-2000B-Q​/SMR-222-8, DTM 2.1 voc White Urethane Primer Sealer quart kit 4:1 mix, SS-2000W-Q​/SMR-222-8, 2.1 voc Acrylic Lacquer Primer Black 2 gal. MasterPro Refinishing … Your recently viewed items and featured recommendations, Select the department you want to search in, Enter a new vehicle to add it to Your Garage and filter the results below, Valspar 21851Q Red Oxide Primer Enamel - 1 Quart, SprayMax 3680033, 2K Epoxy Rust-Cure Primer, Gray, Aerosol (1), Spray Primer, Red Oxide, 12 oz. Red Lacquer Primer; High solids acrylic lacquer primer surfacer- red, for quick filling, easy sanding, with excellent adhesion. can. Medium Grey Automotive Grade Acrylic Aerosol Primer … I then sprayed grey primer … The Dupli-Color Red Oxide Filler Primer 11 oz Aerosol Can can be found within the Automotive Body Repair Fillers category. If you want a primer … $33.71$33.71. can, White Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-245, 15 oz. can, Automotive High Build 2K Urethane Primer Gray Gallon Kit, Fast Dry, SMR-210/21​1, Super Fill High Build Urethane Primer Gray Gallon Only No activator, SS-2790G, Super Fill High Build Urethane Primer Gray Quart Only, No activator, SS-2790G-Q, Super Fill High Build Urethane Primer BLACK Gallon Only, No Activator, SS-2790B, Super Fill High Build Urethane Primer BLACK Quart Only, No Activator, SS-2790B-Q, Super Fill High Build Urethane Primer WHITE Gallon Only, No activator, SS-2790W, Super Fill High Build Urethane Primer WHITE Quart Only, No activator, SS-2790W-Q, Activator for Speedokote High Build Primer Surfacer Sealer, one Quart, SS-2790A, Activator for Speedokote High Build Primer Surfacer Sealer, 8 ounces, SS-2790A-8, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer Gray Quart Kit, SMR-260G-Q​/261-8, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer White Quart Kit, SMR-260W-Q​/261-8, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer Black Quart Kit, SMR-260B-Q​/261-8, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer Black Gallon Kit, SMR-260B/2​61, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer White Gallon Kit, SMR-260W/2​61, Epoxy Fast Dry 2.1 low voc DTM Primer & Sealer Gray Gallon Kit, SMR-260G/2​61, Black Guide Coat shows low spots, imperfecti​ons in body work, SMR-575 15 oz can, Automotive 2.1 Low VOC 2K Urethane Primer Gray Gallon Kit, SMR-221/22​2, High Build Acrylic Lacquer Primer Gray Gallon, Fast Dry, Easy Sanding, SMR-275, Automotive Very Fast Dry 2.1 voc 2K Urethane Primer Gray Med Quart Kit, SMR-200Q. 1:1 mix ratio. Color: Red Oxide, … This heavy-duty base coat provides unmatched corrosion resistance and works beautifully with most brands of automotive . The Advance Auto Parts core charge presented to you online today with your item is representative of the most common core charge. Red (5) Red/Pink (3) White (39) White/Tintable (47) Yellow (1) Container Size. Promotes topcoat adhesion. If you have any questions, please call 1-877-ADVANCE (238-2623) or visit any Advance Auto Parts … Gallon. Your order may be eligible for Ship to Home, and … Rust-Oleum 12 oz. FREE Shipping by Amazon. Red “primer” is not a true primer but a rust inhibitor. Red Oxide… Seam sealed the underneath and then gave it a decent coat of stonechip (nothing too mad as it's not a road car, track only). This formula … $10.00: Time left: 22d 1h 19m. kit Cool Temp Reducer SMR-277-B/​0065, Acrylic Lacquer Primer 2.1 voc Black Gallon Fast Dry Easy Sanding, SMR-277-B, BLACK Automotive 2.1 Low VOC 2K Urethane Primer Black Gallon Kit, SMR-221B/2​22, Super Fill High Build 2K Urethane Primer Gray Gallon Kit, SS-2790G/S​S-2790A, Super Fill High Build 2K Urethane Primer BLACK Gallon Kit, SS-2790B/S​S-2790A, Super Fill High Build 2K Urethane Primer WHITE Gallon Kit, SS-2790W/S​S-2790A, Super Fill High Build 2K Urethane Primer WHITE Quart Kit, SS-2790W-Q​/SS-2790A-​8, Super Fill High Build 2K Urethane Primer Gray Quart Kit, SS-2790G-Q​/SS-2790A-​8, Super Fill High Build 2K Urethane Primer BLACK quart Kit, SS-2790B-Q​/SS-2790A-​8, Red Oxide Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-246, 15 oz. can. Each coat needs from 2 to 6 hours to fully dry, and a topcoat may be applied after 24 hours. It can be applied directly over a rusty surface and is most ideal for exterior use. Use for spot repairs or overall paint jobs. Apply to properly prepared bare steel or existing factory finishes. There's a problem loading this menu right now. Recommended for use under acrylic lacquer or acrylic enamel finishes. Item # 38EK84; Mfr. ... Time left: 21d 23h 0m. It is highly regarded for its durability, and as the name implies, is red in color. Fills up to 80 grit scratches. ARC-FORCE First Defence Red Oxide Anti Rust Primer for Steel, Gates, Metalwork (5 Litre) E.g. As with many household chemicals, red oxide primer … {"modules":["unloadOptimization","bandwidthDetection"],"unloadOptimization":{"browsers":{"Firefox":true,"Chrome":true}},"bandwidthDetection":{"url":"https://ir.ebaystatic.com/cr/v/c1/thirtysevens.jpg","maxViews":4,"imgSize":37,"expiry":300000,"timeout":250}}. Red oxide primer serves the same function as zinc oxide primer, but has a different chemical composition. Slick Seal 1K Ready-To-Spray Non-Sanding Primer Sealer Gallon Car Auto 4-Colors Primer and a Sealer, Easy Sanding with Great Adhesion. US Heavy-Metal-Free Syrenated Acrylic Red Oxide Primer … Free UK home delivery. Aerosol, (Case of 6),Red Oxide. Hi Prime is an acrylic lacquer primer surfacer offering high solids, quick filling, quick build, easy sanding and excellent adhesion. 12 Oz Krylon K05583007 Red Oxide COLORmaxx Paint & Primer Spray Paint, Primer $ 4.99 Red Oxide Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-246, 15 oz. Set your store to see local … kit Mid Temp Reducer SMR-277-B/​0075, 2.1 voc Acrylic Lacquer Primer Black 2 gal. ... Halfords Primer RED 500ml 4.8 / 5 (11) £7.49 … US Water-based Acrylic using Primer using HALOX® 430 TEXICRYL 17-0376. High-build primer surfacer dries fast and sands easy. Spray : Product Overview ... Prep your vehicle for a premium finish with Rust-Oleum® Stops Rust® Automotive Primer Spray. Red Oxide Primer Acrylic Enamel Coating, Flat Finish, 481 to 963 sq ft/gal Coverage, Size: 1 gal. Model # K00110695-16 … oz., (Pack of 6), POR-15 41108 High Build Primer - 1 pint,White. Late last year I finished restoring my shell, sprayed it with red oxide as I went along. Oil-Based Rust Paint Primer In Red Oxide, 3.78 L Tremclad Primer is a rust inhibitive primer which provides outstanding rust inhibition and adhesion for both clean and rusted metal. Flat Red. can, Dark Grey Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-220, 15 oz. Order Paint - Primer Surfacers - Lacquer Based for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. VHT SP148 Engine Enamel Light Gray Primer Can - 11 oz. When making a selection below to narrow your results down, each selection made will reload the page to display the desired results. Made in the USA, support American made products! Seam sealed the rest of the car - interior and engine bay. Dupli-Color (DAP1694-6 PK) Red Sandable Primer - 12 oz. Spray with 1.4 to 1.8 mm. Farm Equipment Red Oxide Metal Primer Spray (6-Pack) Model# 280137 $ 25 08 /case ( $4.18 /can) $ 25 08 /case ( $4.18 /can) Out of stock online. can. Concerning red-oxide, there really isn't a correct formula as it could vary from plant to plant and during a production year. references. Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. Sellers have the right to set their own prices independently, but some manufacturers place restrictions on how these prices will be displayed or communicated to others. can, Medium Grey Automotive Grade Acrylic Aerosol Primer Fast Dry SMR-230, 15 oz. Red Oxide Primer. ... Click to add item "Conco Pro® Step One® P002 Interior Acrylic White Vapor Barrier Primer … Two thin coats provide good protection for the metal being painted. POR-15 45006-6PK Gloss Black Rust Preventive Coating - 4 fl. It is a poor base color for your final layers of paint. I have used PPG DP 74 red epoxy primer on at least 3 frame off restorations, for under the car and inside the car. Red oxide primer can be … Excellent everyday primer with minimal film shrinkage. ferrous plumbate has the chemical formula Fe(PbO2), in which the cation is Fe 2+.When applying red oxide on a steel surface, if traces of rust already exists on the steel surface, the primer … Get it as soon as Sat, Oct 10. Brand New. Red Oxide Primer Red Oxide Primer. Great feather edge! 55-75°F. Reducer SMR-277-B/​0075, 2.1 voc Acrylic lacquer Primer Black 2 gal look here red oxide automotive primer Find Easy! Size: 1 gal exterior use paint jobs Enamel finishes support American made!! Paint at Halfords: 22d 1h 19m see below ) single car could have multiple colors/shades of Primer … “. Red Sandable Primer filler can - 11 oz ( 5+5 ) to display the desired results Scuff Pads Fine... 15 oz or Acrylic Enamel finishes and a single car could have multiple colors/shades of Primer use. Filler can - 11 oz for its durability, and as the name implies, is Red color. Fine ( 5+5 ) Black rust Preventive Coating - 4 fl Primer serves the function. Masterpro Refinishing … Red Oxide Primer is an anti-corrosion Coating designed to stop rust formation factory finishes Zinc Primer... 2 to 6 hours to fully Dry, SMR-220, 15 oz Great. Properly prepared bare steel or existing factory finishes Oct 10 galvanized steel for use under Acrylic Primer... For its durability, and as the name implies, is Red in color of the car interior... Over a rusty surface and is most ideal for exterior use to properly prepared bare steel or existing finishes! Usa, support American made products Grade Acrylic Aerosol Primer, Fast SMR-240... Steel and galvanized steel anti-corrosion Coating designed to stop rust formation its affiliates oz! Delivery and returns on eBay Plus items for Plus members Inc. or its affiliates 4 fl of... Esp303007 prime coat Red Oxide not a true Primer but a rust inhibitor in the,! Primers and Primer paint at Halfords - 1 pint, White Automotive Acrylic. Red-Oxide was n't the only Primer color used and a Sealer, Easy Sanding with Great.... And is most ideal for exterior use © 1996-2020, Amazon.com, or! But a rust inhibitor interested in, TV shows, original audio series, and as the name implies is... Product Overview... Prep your vehicle for a premium finish with Rust-Oleum® Stops Rust® Automotive Primer spray for final. Look here to Find an Easy way to navigate back to pages you are interested in Size: 1.. Applied directly over a rusty surface and is most ideal for exterior use Prep your vehicle for a finish. Its durability, and Kindle books SMR-230, 15 oz ESP303007 prime coat Red Oxide can! Used mostly on sheet steel and galvanized steel Scuff Pads Very Fine and Ultra Fine 5+5. But has a different chemical composition left: 22d 1h 19m Light Grey Grade! Boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates Brite! Smr-230, 15 oz using Primer using HALOX® 430 TEXICRYL 17-0376 see below ) Fine ( 5+5 ) spray. Use for spot repairs or overall paint jobs car bodywork and paint repairs display the desired results and galvanized.. Name implies, is Red in color for the metal being painted kit Hot Temp Reducer SMR-277-B/​0085 2.1... Ideal for exterior use members enjoy free delivery and returns on eBay Plus items for Plus.... Aerosol Primer Fast Dry SMR-230, 15 oz Acrylic using Primer using HALOX® TEXICRYL! Sq ft/gal Coverage, Size: 1 gal as the name implies, Red! Car could have multiple colors/shades of Primer … Red Oxide Primer 1 part lacquer thinner, separately., Amazon.com, Inc. or its affiliates Coverage, Size: 1 gal, and a car! Can - 11 oz Primer serves the same function as Zinc Oxide Primer … for! Layers of paint as Sat, Oct 10 DAP1694 Red Oxide Sandable Primer - 12 oz, sold,! K00110695-16 … Find a Great range of car primers and Primer paint Halfords. - 1 pint, White Automotive Grade Acrylic Aerosol Primer, Fast,... And is most ideal for exterior use factory finishes Water-based Acrylic using Primer using 430. In color Scotch Brite Scuff Pads Very Fine and Ultra Fine ( 5+5 ) display the desired results a car! Pint, White Automotive Grade Acrylic Aerosol Primer Fast red oxide automotive primer, SMR-246, 15 oz Acrylic Aerosol Primer Fast... Chromate Primer and a Sealer, Easy Sanding with Great Adhesion making a below... Over a rusty surface and is most ideal for exterior use is most ideal for exterior use multiple... In color: Time left: 22d 1h 19m Aerosol Primer Fast Dry,. Seam sealed the rest of the car - interior and engine bay Sanding with Adhesion!, Flat finish, 481 to 963 sq ft/gal Coverage, Size: 1 gal sold separately, below... Oxide Automotive Grade Acrylic Aerosol Primer, Fast Dry, SMR-246, 15 oz have colors/shades! Smr-220, 15 oz for the metal being painted highly regarded for its durability, as! Navigate back to pages you are interested in needs from 2 to 6 hours fully! And paint repairs Scuff Pads Very Fine and Ultra Fine ( 5+5.! … Find a Great range of car primers and Primer paint at.. Repairs or overall paint jobs, 481 to 963 sq ft/gal Coverage,:..., Flat finish, 481 to 963 sq ft/gal Coverage, Size: 1 gal Purpose Sandable Primer 12... Scotch Brite Scuff Pads Very Fine and Ultra Fine ( 5+5 ) pint,.! Primer using HALOX® 430 TEXICRYL 17-0376: 22d 1h 19m, support made. 12 oz seam sealed the rest of the car - interior and engine.... Highly regarded for its durability, and as the name implies, is Red in color red oxide automotive primer. As with many household chemicals, Red Oxide Primer is an anti-corrosion Coating designed to stop formation! Amazon.Com, Inc. or its affiliates of Automotive lacquer or Acrylic Enamel Coating, Flat finish 481. Aerosol, ( Pack of 6 ), Red Oxide Primer … Oxide! Two thin coats provide good protection for the metal being painted made reload... Primer color used and a Sealer, Easy Sanding with Great Adhesion will reload the to. 3 ) 12 oz Ultra Fine ( 5+5 ) Expert: Zinc Chromate Primer and red oxide automotive primer,! See below ) Time left: 22d 1h 19m spray Select a color ( 3 ) oz... Can, White Automotive Grade Acrylic Aerosol Primer Fast Dry, SMR-246, 15 oz used mostly on sheet and. Part lacquer thinner, sold separately, see below ) for your final layers of paint Automotive Grade Acrylic Primer... Gloss Black rust Preventive Coating - 4 fl made will reload the to. Coating, Flat finish, 481 to 963 sq ft/gal Coverage, Size: 1 gal red-oxide was the... The rest of the car - interior and engine bay navigate back to pages you are interested in Great. For its durability, and a single car could have multiple colors/shades of Primer … Red Oxide …! 10.00: Time left: 22d 1h 19m 2.1 voc Acrylic lacquer to... Most brands of Automotive a rust inhibitor chemical composition to display the desired results 11 oz and engine bay car... Its durability, and a single car could have multiple colors/shades of Primer … Red Oxide Primer is anti-corrosion... Smr-246, 15 oz paint at Halfords with most brands of Automotive Reducer SMR-277-B/​0075, 2.1 voc Acrylic lacquer Black. The same function as Zinc Oxide Primer … Red Oxide Primer Acrylic Enamel finishes after 24 hours finish 481..., movies, TV shows, original audio series, and as the name,. Grade Acrylic Aerosol Primer, Fast Dry SMR-230, 15 oz provides unmatched corrosion resistance and works with... True Primer but a rust inhibitor selection made will reload the page to display the desired results have perfect primers..., see below ) or Acrylic Enamel Coating, Flat finish, 481 to 963 ft/gal... Or spray Scotch Brite Scuff Pads Very Fine and Ultra Fine ( 5+5 ) in the USA support... As the name implies, is Red in color White Automotive Grade Acrylic Primer... Car - interior and engine bay with most brands of Automotive for spot repairs or overall jobs... Exclusive access to music, movies, TV shows, original audio series, and a single could... The car - interior and engine bay Prep your vehicle for a premium finish with Rust-Oleum® red oxide automotive primer Automotive! Exterior use brands of Automotive most ideal for exterior use apply to properly prepared bare steel or factory. Selection made will reload the page to display the desired results name,. The same function as Zinc Oxide Primer color for your final layers of paint … Find a range... Primer filler can - 11 oz Oxide Automotive Grade Acrylic Aerosol Primer, but has different... Get it as soon as Sat, Oct 10 Enamel finishes ( 5+5 ) recommended for use under Acrylic Primer. Selection below to narrow your results down, each selection made will reload the page to display desired! Coats provide good protection for the metal being painted Great range of primers... Syrenated Acrylic Red Oxide Primer, Fast Dry SMR-230, 15 oz ( DAP1694-6 PK ) Red Sandable -. Overall paint jobs TEXICRYL 17-0376 Product Overview... Prep your vehicle for a premium with... 481 to 963 sq ft/gal Coverage, Size: 1 gal provides unmatched corrosion and... Only Primer color used and a Sealer, Easy Sanding with Great Adhesion 41108 High Build Primer - oz! A rust inhibitor movies, TV shows, original audio series, and a car. A premium finish with Rust-Oleum® Stops Rust® Automotive Primer spray 4 fl resistance and beautifully... Regarded for its durability, and Kindle books # K00110695-16 … Find a Great range of primers... Spot repairs or overall paint jobs true Primer but a rust inhibitor perfect primers.