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Now In: Shop SuppliesSEM Products → SEM Rock-It Liner Kit
SEM Rock-It Liner Kit

SEM Rock-It Liner Kit

SEM Rock-It Liner Kit


SEM Rock-It Liner is a highly durable textured coating for lining truck beds. Can be applied to properly prepped steel, aluminum, fiberglass, wood, concrete surfaces and more. It is chemical and fade resistant. Cover up to a 150 square foot area per gallon of rock-it liner. 

  • Applicator gun is included
  • Fade and chemical  resistant 
  • Maintains flexibility
  • Has sound dampening qualities
  • Can easily be applied with standard undercoating gun
  • Excellent adhesion to most surfaces
  • Tintable version allows you to match OEM colors
  • Can be applied to steel, aluminum, existing OEM paint, fiberglass and SMC
Kit Contains:
  • Rock-It Liner
  • Rock-It Liner Catalyst
  • Economy Coating Gun


  • Black or tintable
  • Coverage: 150 sq. ft./gallon
  • Dry Time: 8 hours - air dry
  • Pot LIfe: 30 min
  • Optimum FIlm Thickness: 6-10 mils
  • Dust Free Time: 45 min
  • Allow 48 hours before light use of truck beds


PDF Prep, Mixing, Application & Cleanup Instructions

PDF Safety Data Sheets: Black Kit / Tintable Kit

Product SKU Price Order
Black, Kit - 42250 SEM-42250
Price: $137.56
Product SKU Price Order
Tintable, Kit - 42260 SEM-42260
Price: $137.56


Customer Reviews
# of Ratings: 1
1. on 6/3/2013, said:
SEM bedliner rock-it liner is crap and so is other products i have used by sem promax genral purpose spray paint, copperweld thru primer,and sem xxx adhesion prompter been in auto body for 10 years and never have the problems with a bedliner as sem rock it liner when it get hot in summer it bubbles peels was prep right used three gallons and all did the same called sem and they thought i was an idiot said they would pull the lot numbers and test it never hear of the results they said sorry you have a solvent trap issue and i tould them it cost me $400 for your kits and i will post this on every review site until i get $400 and i have my recipets and cost you more in the long run and they said whatever i have used upol raptor, dupli color, and monstiliner, with no problems
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