riverkingpainting.com Blog

INTERIOR PRIMERS

Many of you have experience using and selecting primers. Sometimes trying to figure out which primer to use with a particular problem can be difficult and time consuming. Here is a brief explanation of the variety of primers available with information on when to use them and what problems they will help you solve.

High Hiding Primers are best suited for color changes and for new construction to block out underlying color and substrate differences. This is particularly important when topcoat colors are low hiding, such as yellows, pinks, peaches, reds, etcetera. Don’t shade the primer to the exact finish color of low hiding colors, as the primer will then become transparent and not mask the underlying surface. Follow Duron’s Color Prime System to help deliver the customer’s desired color accurately, and with less time and fewer coats.

Adhesion Promoting Primers are best suited for repaint applications over glossy surfaces. While light sanding is important, a CLEAN, SOUND surface is most critical, especially with water-based adhesion promoting primers. For best results, clean first then sand so as not to grind contaminants into the surface. Many adhesion promoting primers are formulated to be applied at a much greater spread rate than conventional primers, thus rendering a lower (thin) film build and lower applied hiding. Applying a thick coat of most adhesion promoting primers is generally not good, as this leads to a longer cure time and actually less adhesion of the primer.
Stain Blocking Primers provide good hiding and also block stains. Examples of common stains include tannin acid found in bleeding woods (such as cedar, redwood, mahogany, and in finger joined trim), water stains, rust stains, markers, and many other household stains. Care must be taken in choosing the right stain blocking primer for the type of stain to be sealed. For example, solvent/oil-based stain blocking primers generally seal a greater variety of stains than their water-based counterparts. In many cases, two coats of a stain blocking primer may be required to totally seal and block severe concentrated stains. In the case of water stains and stains associated with water damage and tannic acid bleeding, all moisture problems (such as roof leaks or poor caulking) must be corrected prior to priming, or the stains will likely reoccur.

High Build Drywall Primers are relatively new to the marketplace (some of these primers also work well on wood). They mask minor imperfections in drywall finishing, and equalize the porosity differences between the drywall compound and the drywall face paper. Most of these products afford easy sanding properties and provide a smoother sealed, sound base prior to topcoating. Check with your paint supplier for products like this and the benefit(s) that they may contribute to your specific application needs. Most all high build primers require airless spray application, as conventional roller and brush applications are not capable of applying these products at the proper film build required. (See Duron High Build Acrylic Drywall Primer.)

Self-Priming Interior Paint Finishes—While primers exist for most every uncoated substrate, there are many interior paint finishes that also work well as a self-primer. these are generally used in new interior construction applications, and primarily on new drywall. Many interior acrylic latex flat and eggshell finishes can be applied as a primer and also as a finish, using 2 or 3 coats. Check with the paint manufacturer for products and applications where this applies to their specific coatings
Duron New Primer Products:
New Construction High Build
Acrylic Drywall Primer
Terminator 2 -
Color Prime Technology
Duron Self-Priming
Finishes:
ALL Interior Acrylic
Latex Eggshell Enamels
ALL Interior Latex Flats

Obtain the Best Appearance

When Painting New Fiber Cement Siding
As an engineered masonry material, exterior fiber cement siding offers exceptional stability, durability and strength. On this surface, a quality paint job will potentially stand up years longer than can be expected with even top quality wood siding. These guidelines will help you achieve the best appearance, maximum durability and the longest repaint cycle.
1.Surface Preparation
Depending on storage conditions and duration and time lapse following installation, the siding material may accumulate dirt or mildew and may exhibit efflorescence.
Treat any mildew with a 3:1 water: bleach solution, leave on for 20 minutes and rinse
Remove any dirt by scrubbing (detergent and water; rinse) or by power washing (water only); remove efflorescence by careful hand wire brushing; clean off residue
2.Priming
Fiber cement siding may be factory primed. While this priming is helpful in keeping moisture, dirt and mildew from penetrating the material during shipment and storage, there may be areas of the facing that are not uniformly and completely sealed. Accordingly, whether factory primed or not, for best performance:

Apply a quality exterior latex primer recommended for use on masonry. This will ensure:
Minimized chance of efflorescence undermining or penetrating the finish coat
Uniformity of sheen development, particularly with satin and semi-gloss finishes
Uniformity of color, particularly critical with darker colors viewed at a low angle
Best resistance of mildew growth
Adhesion of the finish coat
3.Painting
Top quality exterior 100% acrylic house paints are excellent for fiber cement siding.
A satin finish will provide a rich, crisp appearance and will accentuate any texture or embossing in the siding
A flat finish will provide the best sheen uniformity in the event there is an unevenness or repairs made in the siding
Apply by airless spray for maximum uniformity
Apply at 1.5 to 1.7 dry mils per coat; one coat for normal applications, two for maximum durability
Discontinue application by mid-afternoon to minimize chance of surfactant leaching

Type of paint

The type of paint you’ll use depends on how the room to be painted will be used and the type of finish you want. Interior paint is specifically formulated to provide:
• Scrubbability and stain resistance
• Good hiding ability
• Good coverage
• Spatter resistance
• Easy touch-up
Latex or Oil?
Interior house paints are either latex- or oil/alkyd-based. Today, most oil-based paints are made with synthetic resins (alkyds), which perform better than paints based on natural oils. Each has different characteristics and uses. Your neighborhood Sherwin-Williams paint expert can provide advice about which paint is right for your project.
Latex - Get the longest-lasting finish with the best gloss retention. Sherwin-Williams latex paints are easy to work with, dry quickly and are extremely durable. Latex paints clean up easily with soap and water.
Oil / Alkyd - Good adhesion, excellent durability and stain resistance make Sherwin-Williams oil/alkyd-based paints excellent choices for trim in high-traffic rooms, such as kitchens and bathrooms. Clean paint tools with mineral spirits.

Growing and Mowing and Bears, Oh My!

Lowe’s Helps You Get out of Winter Hibernation and Welcome Back Spring

Say Goodbye to Grime and Hello to a Cleaner, Healthier Home

Lowe’s Provides Three Key Elements for the Ultimate Spring Clean