The proportion of heartwood to sapwood in the main stem does vary with species. Black locust, for example, usually has a very narrow band â often less than an inch â of functioning sapwood, whereas maple stems often can have many inches of sapwood and relatively narrow cores of heartwood.he proportion of heartwood to sapwood in the main stem does vary with species. Black locust, for example, usually has a very narrow band â often less than an inch â of functioning sapwood, whereas maple stems often can have many inches of sapwood and relatively narrow cores of heartwood.
1 Apply stain only at the proper temperature. 2  For most stains, 70 degrees Fahrenheit is the optimum, with the safety range from 50 to 90 degrees Fahrenheit. 3  Stains do vary, so check the label first.o assure the highest quality results when applying exterior wood stain, follow these steps and helpful tips from Sherwin-Williams stain experts. 1  Use the right brush. 2  Use a natural-bristle brush for oil stains and a synthetic-bristle brush for latex stains.
How long should I waite to put a stain/sealant on my wood fence? Its been up for about a month now and the temp here has been crazy lately. One day it will be mid 70's and the next the high will be in the 50's.I write about the temp because if I'm not mistaken, stains have temperature recommendations on them. I have heard I should waite a year before staining and I have heard waite about 3 months. I have no idea what to believe.ne day it will be mid 70's and the next the high will be in the 50's. I write about the temp because if I'm not mistaken, stains have temperature recommendations on them. I have heard I should waite a year before staining and I have heard waite about 3 months. I have no idea what to believe.