Exterior Primers & Undercoats

Frequently Asked Questions
Is exterior undercoat waterproof?

Almost all exterior undercoats are waterproof, but only after drying. It's important to apply your undercoat during clear weather and give it ample time to dry.

Does exterior wood need primer?

All unfinished exterior wood needs a primer before painting. Exterior wood primer or undercoat fills in the wood's pores and any imperfections that may cause uneven paint or prevent the paint from sticking. Applying exterior paint primer will help your finish come out smoother and cleaner. Primer will also help protect your wood from the elements and make your paint job last longer.

Can exterior primer be used inside?

At Homebase we offer primers that are for interior and exterior use, however, it does depend on the surface you want to work on. Always check the tin before applying primer to your chosen surface.